OpenLDAP REL_ENG_1_2 on OSF4.0e with DB-2.7.5

Encountered a problem today with slapd going into an infinite loop.
It continued to serve requests, though slowly. Has anybody else
seen this behavior? It reminded me of the old FD_SETSIZE bug, but
a brief check of the code looks like that stuff is handled correctly.
Tried to build gdb so that I could take a look at it, but the final
linking of gdb exits with an exit code of 2, without so much as a
message. Anybody know what that's about before I run off to the GNU
project?
Also, build/config.sub still does not have alphaev6 in it. So, apparently
my eyes deceived me when I said the latest autoconf had it -- it does not.
The following needs to be added (no warrantys -- I do not pretend to know
for certain what it is checking for here or exactly why) to make alphaev6
a valid machine type:
Index: config.sub
===================================================================
RCS file: /repo/OpenLDAP/pkg/ldap/build/config.sub,v
retrieving revision 1.1.2.1.2.1
diff -r1.1.2.1.2.1 config.sub
155c155
< | alpha | alphaev5 | alphaev56 | we32k | ns16k | clipper \
---
> | alpha | alphaev5 | alphaev6 | alphaev56 | we32k | ns16k | clipper \
179c179
< | alpha-* | alphaev5-* | alphaev56-* | we32k-* | cydra-* \
---
> | alpha-* | alphaev5-* | alphaev6-* | alphaev56-* | we32k-* | cydra-* \
Randy Kunkee
NeoSoft Inc.